Postville, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Postville, a city in Allamakee County, Iowa.
Overnight
61°F
Showers And Thunderstorms
Showers and thunderstorms. Cloudy, with a low around 61. East wind around 13 mph, with gusts as high as 23 mph. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.
7-day forecast for Postville
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 61°F | Showers And Thunderstorms | 13 mph E | 91% |
| Saturday | 72°F | Showers And Thunderstorms | 6 to 10 mph S | 78% |
| Saturday Night | 57°F | Showers And Thunderstorms Likely then Slight Chance Showers And Thunderstorms | 6 to 13 mph N | 64% |
| Sunday | 67°F | Slight Chance Rain Showers then Mostly Cloudy | 15 mph NE | 18% |
| Sunday Night | 51°F | Mostly Cloudy then Slight Chance Rain Showers | 12 mph NE | 18% |
| Monday | 62°F | Slight Chance Rain Showers | 10 mph NE | 24% |
| Monday Night | 46°F | Slight Chance Rain Showers then Mostly Cloudy | 5 to 8 mph NE | 20% |
| Tuesday | 60°F | Mostly Sunny | 5 to 8 mph NE | 14% |
| Tuesday Night | 43°F | Partly Cloudy | 5 mph NE | 2% |
| Wednesday | 64°F | Sunny | 5 mph NE | 1% |
| Wednesday Night | 47°F | Mostly Clear | 2 mph E | 3% |
| Thursday | 66°F | Mostly Sunny | 3 mph E | 7% |
| Thursday Night | 50°F | Partly Cloudy | 1 mph E | 3% |
| Friday | 69°F | Mostly Sunny | 3 mph E | 5% |
Forecast source: National Weather Service (api.weather.gov) for Postville (43.084, -91.568). Updated through the day.
Growing snapshot for Postville
Last spring frost
May 1
First fall frost
Oct 3
Growing season
153 days
Hardiness zone
5a
More local growing data for Postville: nearby ZIP 52162 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Postville, Ia (1.5 mi from Postville). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.